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| Difference between Mini-Pac and Mini-Pac Opti. ? |
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| PL1:
--- Quote from: GeoMan on June 11, 2013, 05:46:51 pm ---I checked with MouseRate and the average polling rate of the SpinTrak connected through the Mini-Pac is 250Hz. Not bad, but not very good either. My other SpinTrak with it's own dedicated USB circuit reports 500Hz... --- End quote --- Don't worry about the polling rate. Andy addressed that issue here. --- Quote from: AndyWarne on June 09, 2013, 12:01:08 pm --- --- Quote from: paigeoliver on June 07, 2013, 04:24:52 pm ---I don't know any of the polling rates of anything off hand, but what I do know is that every bit of mame gear I ever saw polled the controls way more often than any of the emulated hardware did. --- End quote --- That's correct. But I think the issue of poll rate comes up because historically using low-speed USB devices and also 8 bit data packets there is a possibility of the data "overflowing" if the device is spun fast. On our boards, 16 bit data packets are used and also a faster poll rate than low-speed USB because they use full-speed USB so there is no possibility of this happening. --- End quote --- Scott |
| RandyT:
--- Quote from: GeoMan on June 11, 2013, 05:46:51 pm ---I checked with MouseRate and the average polling rate of the SpinTrak connected through the Mini-Pac is 250Hz. Not bad, but not very good either. My other SpinTrak with it's own dedicated USB circuit reports 500Hz... --- End quote --- Don't sweat polling rates. There is no useful benefit for high polling rates in gameplay, after about 2x the polling rate of the controls used on the original machines, which was ~60hz or less. With very high resolution devices, which need to be downsampled for accurate play, there is the potential for "backspin" at low polling rates. Even so, for it to do this requires using the control in a way well outside the boundaries of what gameplay requires, and any possibility of "backspin" can be eliminated by other means internally within the interface. If you are using a high resolution encoder on industrial machinery for counting cans in a high speed production line, that's a different story :) |
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